Leak in NDCodec compressJPEG

[daykin]

We are seeing a fairly big (2+GB/week) memory leak in a couple of our camera IOCs. Heaptrack pinpointed the issue as:

<unresolved function> in libjpeg.so.62 (2.2GB leaked) jpeg_set_defaults in libjpeg.so.62 compressJPEG(NDArray*, int, NDCodecStatus_t, char* in libNDPlugin.so.3.12

ADCore/ADApp/pluginSrc/NDPluginCodec.cpp

Line 114 in d27d71f

jpeg_create_compress(&jpegInfo);

calls jpeg_create_compress but never destroys it (see https://github.com/kornelski/libjpeg/blob/41f55c093a551ff5df0431155de978618862bbc9/libjpeg.doc#L466).

[daykin]

I think it's as simple as adding jpeg_destroy_compress. Testing shortly.

[daykin]

#540 merged

[MarkRivers]

I reproduced the memory leak before the fix, and now it is gone.